From: Timur Kristóf <timur.kristof@gmail.com>
Date: Thu, 25 Sep 2025 18:45:25 +0000 (+0200)
Subject: drm/amd/display: Disable scaling on DCE6 for now
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=0e190a0446ec517666dab4691b296a9b758e590f;p=users%2Fjedix%2Flinux-maple.git

drm/amd/display: Disable scaling on DCE6 for now

Scaling doesn't work on DCE6 at the moment, the current
register programming produces incorrect output when using
fractional scaling (between 100-200%) on resolutions higher
than 1080p.

Disable it until we figure out how to program it properly.

Fixes: 7c15fd86aaec ("drm/amd/display: dc/dce: add initial DCE6 support (v10)")
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Timur Kristóf <timur.kristof@gmail.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---

diff --git a/drivers/gpu/drm/amd/display/dc/resource/dce60/dce60_resource.c b/drivers/gpu/drm/amd/display/dc/resource/dce60/dce60_resource.c
index 53c67ebe779f..b75be6ad64f6 100644
--- a/drivers/gpu/drm/amd/display/dc/resource/dce60/dce60_resource.c
+++ b/drivers/gpu/drm/amd/display/dc/resource/dce60/dce60_resource.c
@@ -404,13 +404,13 @@ static const struct dc_plane_cap plane_cap = {
 	},
 
 	.max_upscale_factor = {
-			.argb8888 = 16000,
+			.argb8888 = 1,
 			.nv12 = 1,
 			.fp16 = 1
 	},
 
 	.max_downscale_factor = {
-			.argb8888 = 250,
+			.argb8888 = 1,
 			.nv12 = 1,
 			.fp16 = 1
 	}